| Proj No. | A2084-251 |
| Title | Design a Wavelength-Independent Bessel Beam Dielectric Metasurface |
| Summary | Bessel beams are non-diffracting light beams with unique properties, such as self-reconstruction and the ability to generate optical pulling forces. These beams have applications in laser fabrication, optical manipulation, and imaging. Traditional methods of generating Bessel beams, such as using conical prisms or annular apertures, suffer from limitations in numerical aperture (NA) and efficiency. In this project, we will design a dielectric metasurface-based Bessel beam generator that overcomes these limitations. The metasurface will be composed of titanium dioxide (TiO₂) nano-fins arranged in a square lattice, capable of generating high-NA Bessel beams. The design will leverage the Pancharatnam-Berry phase to achieve wavelength-independent performance across the visible spectrum. The project will involve simulating the metasurface using FDTD software and optimizing the nanofin dimensions for high polarization conversion efficiency. The final goal is to experimentally demonstrate the generation of zeroth-order and higher-order Bessel beams with subwavelength resolution and wavelength-independent intensity profiles. This project will provide students with expertise in metasurface design, optical beam shaping, and advanced nanofabrication techniques, preparing them for careers in photonics, optical engineering, and quantum technologies. |
| Supervisor | Ast/P Guangwei Hu (Loc:S1 > S1 B1B > S1 B1B 39, Ext: +65 67904337) |
| Co-Supervisor | - |
| RI Co-Supervisor | - |
| Lab | Characterization (Loc: S1-B2c-20) |
| Single/Group: | Single |
| Area: | Microelectronics and Biomedical Electronics |
| ISP/RI/SMP/SCP?: |